If I buy fresh pork that isn’t pre-wrapped, can I still refrigerate it in the store wrapping?

You can refrigerate it in the paper supplied by the supermarket if it is tightly wrapped and taped up. If the pork is loosely wrapped, it should be re-wrapped. Because paper is somewhat permeable, it’s best to re-wrap the pork in plastic. Aluminum foil may leave a metallic taste. Place the pork in a shallow pan--not on a plate--and place it on the bottom shelf of your refrigerator to ensure drippings don't contaminate other products.
 
Source(s):
Brewer, M.S. and Chapman-Novakofski, K. 2006.  Meat Safety for the Consumer, University of Illinois Extension.